THE SKULL. 



TO 



, II. 



G 



Fto. 05. SKULL OF A AViLD DUCK (Anas baschas). A, from above; B, from below ; 



C, from the side. 



.Z.s, alisphenoid ; ay, angular ; ar, articular ; a.p.f, anterior palatine foramen ; b.t, 

 basitemporal ; b.o, basioccijiital ; b.pg, basipterygoid ; b.s, basisphenoid ; d, 

 dentary ; e.n, external nostrils ; eth, ethmoid ; c.o, exoccipital ; e.u, Eustachian 

 aperture ; fr, frontal ; f.m, foramen magnum ; i.c, foramen for internal carotid 

 artery ; j, jugal ; Ic, lacrymal ; mx.p, maxillopalatine process ; mx, maxilla ; 

 n, nasal ; n.px, nasal process of the premaxilla ; px, premaxilla ; p, parietal ; ps, 

 presphenoid ; pg, pterygoid ; pi, palatine ; p.n, internnl nostrils ; q, quadrate ; 

 q.j, quadratojugal ; sq, squamosal ; s.o, supraoccipital ; ty, tympanic cavity; 

 v, vomer ; //, foramen for optic nerve ; V, for trigeminal ; IX, X, for glosso- 

 pharyngeal and vagus ; XII, for hypoglossal. 



